7
2.3.5A ADJUSTING THE HEATING WATER
TEMPERATURE WITH AN OUTDOOR
TEMPERATURE SENSOR CONNECTED
If an outdoor temperature sensor is installed and thermoregu-
lation is enabled (parameter P4.18=1), the delivery tempera-
ture is automatically selected by the system, which quickly
adjusts the ambient temperature according to the variations in
the outdoor temperature.
If you want to change the temperature, raising it or lowering it
with respect to that automatically calculated by the electronic
board, it is possible to change the HEATING setpoint selecting
the desired comfort level within the range (-5 - +5).
Note: if an outdoor temperature sensor is connected it is in
any event possible to have the boiler operate at a fixed point
by setting the parameter P4.18 = 0 (menu P4).
2.3.6A ADJUSTING THE DOMESTIC HOT WATER
TEMPERATURE
On the main screen, pressing the key
A
rather than
B
displays
the current domestic hot water setpoint, the value blinks with a
frequency of 0.5 sec ON, 0.5 sec OFF and the icons
and
come on.
A
RESET
+
MENU
+
B
The successive pressing of the keys
A
or
B
allows you to set
the value of the domestic hot water setpoint raising or lowering
the value within the preset range in steps of 0.5°C. The level
bars beside the heating icon show the setpoint value set with
respect to the operating range:
- four bars on = max setpoint
- one bar on = min setpoint
2.3.7A SAFETY STOP
If there are ignition faults or boiler operation malfunctions,
carry out a “SAFETY STOP”. On the display, in addition to the
fault code, the icon is also displayed, which blinks with a
frequency of 0.5sec ON and 0.5sec OFF.
The backlight blinks for 1min after which it switches off, while
the icon continues blinking.
On the 4 digits a message scrolls containing the error code
and its description.
DAY
2.3.8A RESET FUNCTION
The “RESET” icon comes on when there is an alarm that
requires a manual reset by the user (for example flame
lockout). To reset the lockout press key 2 RESET.
DAY
RESET
If the reset attempts do not restart the boiler, contact you en-
gineer or Vokera Ltd. for help or advice.
2.3.9A DOMESTIC HOT WATER COMFORT FUNCTION
Pressing the keys
A+B
for at least 2sec gives you access to
the domestic hot water comfort functions. COFF is shown on
the display and the icons
,
, and
come on:
Using the keys
,
you can scroll through the options
in sequence CSTD and then COFF again. Using the key
activates the desired function and you exit the menu returning
to the initial screen. A scrolling message appears on the
display with the following mode:
Function
Scrolling message
CSTD
COMFORT STANDARD
COFF
COMFORT OFF
CSTD
(PREHEATING function)
By setting CSTD, the domestic hot water preheating function
of the boiler activates. This function keeps the water in the
domestic hot water exchanger hot, to reduce standby times
when a request is made. When the preheating function is
enabled the scrolling message PREHEATING FUNCTION
IN PROGRESS is displayed. To deactivate the preheating
function set COFF. The function is not active when the boiler
is OFF.
2.4A OTBus REMOTE CONTROL
CONNECTION
When an OTBus remote control is connected to the system,
the boiler display shows the following screen:
In particular on the boiler display:
it is no longer possible to set the boiler OFF/WINTER/
SUMMER status (it is set by the OTBus remote control)
it is no longer possible to set the domestic hot water
setpoint (it is set by the OTBus remote control)
the combination of the
A+B
keys remains active for the
setting of the DOMESTIC HOT WATER COMFORT
function
the domestic hot water setpoint is displayed in the INFO
menu.